Technical Documents

Bluetooth Module Appnotes HC-05 AT Command Guide Arduino HC-05 Tutorial HC-05 Bluetooth Module Datasheet (CSR BC417 Based)

EMC-00004-A

Name: Bluetooth Module
Brand: Generic
SKU: EMC-00004-A
Availability: InStock

(Last updated) May 08, 2026

Bluetooth Module

HC-05 Bluetooth Module

Description

The HC-05 Bluetooth Module is a 6-pin wireless serial communication device designed for UART-based data transfer between microcontrollers and Bluetooth-enabled devices. Operates in the 2.4GHz ISM band using GFSK modulation and supports both Master and Slave modes. Supports AT command configuration and includes an onboard push button for AT mode entry.

Manufacturer Details

Manufacturer	Part Number
HC Series / Generic Compatible	CSR BC417
Waveshare	HC-05
KEYESTUDIO	KS0387
SunFounder	HC-05

Vendor Suppliers

Amazon ( india ) Amazon ( Japan ) Amazon ( USA ) Amazon ( canada ) Robu.in ( India ) FlyRobo ( India )

Application Resources

HC-05 with Arduino Connection

Technical Specifications

Operating Voltage	3.6V – 6V DC
Input Current	50 mA
Operating Frequency	2.4 GHz ISM Band
Modulation Type	GFSK (Gaussian Frequency Shift Keying)
Emission Power	4 dBm (Class 2)
Receiver Sensitivity	-84 dBm at 0.1% BER
Maximum Range	10 meters (typical)
Interface Pins	EN/KEY, VCC, GND, TXD, RXD, STATE
AT Command Support	Yes
Onboard Button	Yes (AT Mode Selection)
Length (mm)	43
Width (mm)	16.5
Height (mm)	7
Weight (g)	5
Shipping Weight	0.01 kg
Shipping Dimensions (cm)	5 × 3 × 1